McLaren Racing Director Eric Boullier has confirmed that a replacement for aerodynamics expert Dan Fallows has already identified.
McLaren announced at the beginning of the year that Fallows would join the team from Red Bull, but he recently revealed that he would stay at the Milton Keynes outfit instead.
McLaren boss Ron Dennis has threatened Red Bull with legal action as a result, but on Tuesday, Boullier confirmed that a contingency plan was in place and that they have another candidate in mind.
"We have to deal without him today so we have to consider all of the scenarios," Boullier told crash.net.
"But also we have to consider the scenario that he will never be back or he will never join us, so we are implementing what we have to do and we have already."
Boullier confirmed that an appointment would be made from outside McLaren, but joked when asked about when the announcement would be made public: "When they join us and when we are sure that they come in in the morning!"